Can Someone . It may look silly and simple to you , but as a beginner I am unable to achieve the following I am trying to send custom string value to pjsip library .But don't know how to do that . As you already know pjsua is high-level API for pjsip . in pjproject/pjlib/src/pj/sock_bsd.c i have this PJ_LOG(1,(THIS_FILE, "%s", str)); i want to set str value from IOS xocde in sample apps pjsip-apps/ ipjsuaAppDelegate.m includeed #import "ipjsuaAppDelegate.h" #import <pjlib.h> #import <pjsua.h> #import <pj/log.h> #include "../../pjsua_app.h" #include "../../pjsua_app_config.h" //here i want write function to send string value to sock_bsd.c // -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20150325/1cb3e502/attachment.html>